26/10/2004 21:14:30, "Glen VanMilligan"
<
glenv@vpcvalley.com> wrote:
>Steve,
>Are you using a mother board now?
No. Anything I need to do can be done with either CompactFlash
or GPIOs.
> What do you expect of a mother board.
I don't have any expectations - it's entirely up to you. If you want
to make your backplane as useful as possible to other people,
then a fair-sized FPGA and a bunch of connectors would be
hnady.
>think for our equipment, we will need to have a mother board in
our design
>as I have to tie into some other analog and digital signals. I want
to put
>the extra I/O (we are designing)on the mother board as well as
the LCD
>Connector. I might consider some of the other comm connectors
coming to the
>Mother Board.
All sounds etirely reasonable.
>By the way, since I am using the LCD lines for an LCD, what
memory address
>can I use on this board, (I only have A0 - A25 to work with) that I
can tie
>my extra I/O to?
The SA1110 (and others in the series) has a selection of chip
selects, as well as the address bus. nCS0 has to have bootable
ROM on it, NCS1 and 2 have static timing devices (no RDY pin),
NCS3, 4, 5 can have static or variable latency timing devices.
All you'd need to do would be to use nCS5 (since that's spare),
and pick off addresses within that space using the address lines,
using a PLD to generate all teh chip selects you could possibly
want.
If you fetch the SA1110 datasheet from Intel, Chapter 10 is well
worth a quick read, and covers most of what you'll need in teh
first 3 pages.
www.intel.com/design/pca/applicationsprocessors/retdocs.htm
is where all the SA1110 datasheets have been hidden, and there's
a lot of good stuff there. You certainly don't need to digest all of it,
but it's good to have.
Steve
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